A.has continuously for a long period B.suction pressure is below normal C.oil level is below normal D.starts after a long idle period
A.protect the pump from fine soluble contaminants B.prevent solid particles from entering the pump C.prevent solid particles from entering the filter D.protect the directional control valves
A.Feed-water heater internal tube surfaces B.Internal distillate cooler tubes C.Flash chamber vertical surfaces D.Distilling condenser tubes